Karpov vs Portisch, 1982  (C42) Petrov Defense, 38 moves, 1-0 Karpov vs A J Mestel, 1984  (C05) French, Tarrasch, 61 moves, 1-0 Karpov vs V Malaniuk, 1988  (A87) Dutch, Leningrad, Main Variation, 35 moves, 1-0